Application of Modified Clay Mineral Waste Material for Removal of Phosphorus from Aquatic System | Chapter 08 | Emerging Challenges in Environment and Earth Science Vol. 2

 Phosphorus (P) is one of the most important components that contributes to eutrophication in aquatic systems. The application of modified clay mineral waste material (MCMWM) for the removal of P from aquatic systems, including surface water and wastewater, was investigated in this work. At pH values of 3, 5, 6, 7, and 9, with P concentrations of 10, 20, 40, 100, and 200 mg/L in solution, the effects of ionic strength and pH on P adsorption by MCMWM were examined. Early on, P adsorption was rapid, with 95 percent of P in solution adsorbed in 0.5 hours for 10 mg/L P in solution at a high pH range. With increasing ionic strength, the amount of P adsorbed increased. For P adsorption at 10 mg/L, the amount of P adsorbed rose steadily as pH values increased from 3 to 9. Other series of P concentrations in solution revealed erratic trends, owing to the effect of pH on P adsorption rates, as well as the effect of ionic strength. For all levels of P concentrations, the maximum amounts of P adsorbed and the highest percentages of P adsorbed were achieved at pH 9, and for lower P concentrations in solution, pH 7. The amount of P adsorbed at high pH values was observed to rise when the calcium (Ca) ion formed a bridge for P adsorption in solution, which was related to Ca's effectiveness in favouring P to be adsorbed either onto the surfaces or incorporated into the structural bonds of MCMWM. The major parameters that controlled P adsorption in solution were discovered to be ionic strength, pH, and modification procedure.

Author(S) Details

S. Y. N. Jiang
Environmental Science Program, Division of Science and Technology, United International College, Beijing Normal University-Hong Kong Baptist University, Zhuhai, Guangdong Province, 519085, P. R. China and National Observation and Research Station of Coastal Ecological Environments in Macao, Macao Environmental Research Institute, Macau University of Science and Technology, Macao SAR 999078, P. R. China.

L. C. Su
Environmental Science Program, Division of Science and Technology, United International College, Beijing Normal University-Hong Kong Baptist University, Zhuhai, Guangdong Province, 519085, P. R. China.

H. D. Ruan
Environmental Science Program, Division of Science and Technology, United International College, Beijing Normal University-Hong Kong Baptist University, Zhuhai, Guangdong Province, 519085, P. R. China.

G. F. Zhang
Environmental Science Program, Division of Science and Technology, United International College, Beijing Normal University-Hong Kong Baptist University, Zhuhai, Guangdong Province, 519085, P. R. China.

S. Y. Lai
Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong.

C. H. Lee
Environmental Science Program, Division of Science and Technology, United International College, Beijing Normal University-Hong Kong Baptist University, Zhuhai, Guangdong Province, 519085, P. R. China.

C. F. Yu
Environmental Science Program, Division of Science and Technology, United International College, Beijing Normal University-Hong Kong Baptist University, Zhuhai, Guangdong Province, 519085, P. R. China.

Z. Wu
Environmental Science Program, Division of Science and Technology, United International College, Beijing Normal University-Hong Kong Baptist University, Zhuhai, Guangdong Province, 519085, P. R. China.

X. Chen
Environmental Science Program, Division of Science and Technology, United International College, Beijing Normal University-Hong Kong Baptist University, Zhuhai, Guangdong Province, 519085, P. R. China.

S. He
Environmental Science Program, Division of Science and Technology, United International College, Beijing Normal University-Hong Kong Baptist University, Zhuhai, Guangdong Province, 519085, P. R. China.

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